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Earthquake Alert is a mobile application from the Ministry of Environment of El Salvador that notifies users of earthquakes that may be felt and provides, in the best of cases, early warning and that the user has time to take the action to PROTECT THEMSELVES. .
Effective only at distances between about 50 to 150 km. Closer there is no time to warn and further away, although the earthquake can be felt, it will not cause significant damage for an alert to be declared.
It is a free application and a service provided by MARN, El Salvador as a complement to the information dissemination work carried out by MARN. It is a fully automated system that links multiple instruments and algorithms and is therefore susceptible to technical failures.
The app provides three types of alerts: Red, Orange and Green.
The Red Alert is one that means that the earthquake can be felt with intensity on the Modified Mercalli Scale (IMM) greater than or equal to V and that the user has a few seconds to take the action to PROTECT THEMSELVES. It is notified with VOICE command and vibration.
The Orange Alert is one that means that the earthquake can be felt with an intensity greater than or equal to III but less than V. It is notified with SOUND and vibration.
The Green Alert is one that means that the earthquake can be felt with intensity less than III. It is notified silently.
For each event there is the option to report the experience of what you perceived or felt during the earthquake.